Just a couple of weeks ago, scientists held out hope the new coronavirus could be largely contained within China. Now they know its spread can be minimized at best, and governments are planning for the worst.
“It is not a matter of if — it is a matter of when,” said Amesh Adalja, a senior scholar at the Johns Hopkins University Center for Health Security and a spokesman for the Infectious Diseases Society of America. “There is not a doubt this is going to end up in most countries eventually.”
The U.S., with 11 diagnosed cases so far, plans to quarantine at military bases potentially more than 1,000 Americans evacuated from China’s Hubei province. State health departments are activating emergency programs to isolate the potentially infected — a piecemeal approach that could range from specialized facilities to hotels. Some hospitals have tents in stock to use as emergency isolation wards.
“This is about mitigation at this point, and keeping the global spread as minimal as possible,” said Rebecca Katz, a professor and director of the Center for Global Health Science and Security at Georgetown University.
Other countries, including the U.K. and France, are also pulling some of their citizens out of China. The World Health Organization declared a public health emergency of international concern to guide developing countries that might not have robust health-care systems that could withstand the virus, which is known for now as 2019-nCoV.
The outbreak has made more than 20,000 people sick in at least two dozen countries. The vast majority of cases — and every death but two thus far — have been in mainland China.
Total containment isn’t in the cards, said Nancy Messonnier, director of the Centers for Disease Control and Prevention’s National Center for Immunization and Respiratory Diseases. “Given the nature of this virus and how it’s spreading, that would be impossible. Our goal is to slow this thing down.”
Measures taken in the U.S. have been criticized in China, where officials said the Americans are stoking fear and overreacting. The CDC responded that it has no choice. The infection is spreading rapidly and humans have no protection against it, Messonnier said. While most cases appear to be mild, the worry is that it will spread to a large number of people and turn deadly in those most vulnerable.
“This is an unprecedented situation and we are taking aggressive measures,” she said. “We are preparing as if this were the next pandemic.”
The CDC has developed a new test that would allow samples taken from patients to be tested locally instead of sent to CDC headquarters in Atlanta, saving transportation time and getting results faster. The test was cleared for use by the Food and Drug Administration on Tuesday.
In China, cases are exploding. As of Wednesday morning China time, more than 24,000 people in the country were infected and at least 490 had died. Many Western researchers think the actual number of cases is many times higher. Overworked doctors at the epicenter face a shortage of testing kits and overcrowded hospitals, and can’t keep up with the number of cases.
“This is a horrible situation in China,” CDC’s Messonnier said. The disease-tracking agency has been trying to get a team on the ground in China, though hasn’t so far.
Early on at the epicenter of an epidemic, “there is a fog of war experience where it is hard to keep track of things,” said Thomas Frieden, a former CDC director who now heads Resolve to Save Lives, a nonprofit that works on epidemic prevention. “So many people are coming in ill, it is hard to keep track of the numbers.”
Epidemiologists are struggling to predict how the outbreak may evolve over time. The lack of tests to detect the disease, the potential for patients to be infected with only mild or no symptoms and the overwhelmed health care system in China has cast doubt on the accuracy of the numbers that the government is providing.
One set of researchers from the University of Hong Kong estimated in the Lancet, a medical journal, that there were more than 75,000 cases in Wuhan as of Jan. 25, with cases doubling every 6.4 days.
Another group estimated that only 5% of cases in the outbreak’s center in Wuhan have been identified. This group, led by researcher Jonathan Read, from the Center for Health Informatics, Computing and Statistics at Lancaster Medical School in the U.K., estimated that more than 100,000 people in Wuhan were infected by Jan. 29. It was posted on the website medRxiv and hasn’t been reviewed by other experts.
The likely higher number of cases is good and bad. Bad because more people have it and are spreading it, good because the case-fatality rare — now around 2%, based only on diagnosed patients — is likely to come down substantially as mild cases are accounted for.
What makes the new coronavirus hard to stop is that it is somewhat between the common cold, which is often caused by coronaviruses, and SARS in severity. The SARS epidemic — the first coronavirus to spark a deadly outbreak — started in China in late 2002, eventually infecting more than 8,000 people and killing nearly 800 before it burned itself out.
Like SARS, the new coronavirus sometimes causes severe case that can kill, although it appears to do so at a much lower rate.
Unlike with SARS, many who appear to get the new coronavirus have mild cold-like symptoms. That makes it much harder to stop, as people may have passed it on before the realized what they had.
Of the 11 confirmed cases in the U.S., nine people brought the virus in from the Wuhan area. Illustrating how easily the disease spreads, two others — a man in Illinois and a woman in California — acquired it here from their spouses after they returned from China. While some of these patients are being treated in hospitals, others have been asked to stay home and self-isolate, keeping the virus out of medical centers.
Hospitals are on alert. Providence St. Joseph Health, a chain of 51 hospitals and more than 1,000 clinics in seven western states, treated the first U.S. coronavirus case at one of its hospitals.
“As soon as we got our initial patient it was our wake-up call,” said Amy Compton-Phillips, chief clinical officer for the hospital system. The hospital system has set up alerts in its electronic medical records system, prompting staff to ask potential patients about travel to China, or if they’ve been in touch with somebody who has. The initial patient has been discharged but remains in isolation.
“We are working very hard to prevent another flu-like illness from becoming endemic in the U.S.,” Compton-Phillips said.
Northwell Health, a 23-hospital system in New York with 800 outpatient facilities, began screening all patients for travel history to affected areas about two weeks ago, said Mark Jarrett, chief quality officer and deputy chief medical officer.
Patients who have recently been to China are given masks, brought to airborne isolation rooms and evaluated by staff wearing protective gear. And Northwell staff who encounter a suspected case of coronavirus have a central phone line to connect with senior clinicians who can help evaluate and make sure samples are sent to the CDC for testing.
In the event of widespread circulation, Northwell is planning “surge units” that will steer suspected cases to particular hospital wards, separated from others who might be vulnerable. It also has mobile tents that can be set up as field hospitals.
“If there’s a sudden surge of patients because of the fact that it’s that widespread, you clearly will never have enough airborne isolation rooms,” Jarrett said. “There just aren’t. No hospital has enough.”
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